Method for investigating the implementation reality of source maps

[littledan]

When web specifications have gone down the road of hardening existing shipping behavior, it's often based on investigating how browsers work. For source maps, given that they are often both produced and consumed outside the browser, we should do a somewhat broader survey. Let's list tools and implementations here that should be checked, in understanding the current implementation reality of source maps in the world, and how to experiment with them.

[kamilogorek]

I prepared a playground with the most widely used tools in the JS ecosystem that can be used to validate changing behavior.

https://github.com/kamilogorek/sourcemaps-playground